Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 15:55 and arrives at Hanoi Noi Bai International Airport at 18:05.
The flighttime is about 2h 10m. The distance travelled ("as the bird flies"): 593 Km. So the average speed is roughly 274 Km.
The best month to arrive at Bangkok is July and the most expensive month to fly is February. (Average prices, based on 219 datapoints.)
We have a lot more statistics for flights GA 614 and between Bangkok and Hanoi.
THB
